jQuery(document).ready(function() {
    jQuery('#slideshow').cycle({ 
      speed:  4000,
      continuous:  1,
      timeoutFn: calculateTimeout 
    });

  function calculateTimeout(currElement, nextElement, opts, isForward) { 
      // here we set even number slides to have a 2 second timeout; 
      // by returning false for odd number slides we let those slides 
      // inherit the default timeout value (4 sec) 
      var index = opts.currSlide; 
      return index % 2 ? 2000 : false; 
  } 
});